Bottom roll clearer for textile machines



1938- N. o. PETREA 2,126,500

BOTTOM ROLL CLEARER FOR TEXTILE MACHINES Filed Aug. 2, 1937 E 5"HORFLEET-O-PETREA Patented Aug. 9, 1938 PATENT orFicE BOTTOM ROLLCLEARER FOR TEXTILE MACHINES Norfieet 0. Petrea, Mount Pleasant, N. C.Application August- 2, 1937, Serial No. 156,986

' 1 Claim. (01. 19-139),

This invention relates to a clearing mechanism for textile machines suchas drawing frames, spinning frames and the like, and more especially toa supporting means whereby a clearer is resiliently held in contact withthe bottom rolls of the drawing mechanism. Heretofore, various methodshave been employed for holding the clearer against the bottom portion ofthe bottom rolls. so that the lint which accumulated, on the peripherythereof would be removed and deposited upon the clearer. In mostinstances, the clearers have been held in contact with the bottom of therollers by a direct upward pull'frorn the top of the clearer, by astring secured to the clearer 1'5 with a weight on the end thereof, saidstring being adapted to partially encircle a low portion of the rolls.This method of supporting the clearer has, to a certain extent, provenunsatisfactory, not only because the string would soon become Worn,

0 but also, because the clearer could not be easily detached from thebottom rolls without removing the weight from the end of the string.Also, great difficulty has been experienced in adjusting the amount ofpressure exerted by the clearer upon the periphery of the bottom rolls.

It is therefore, an object of this invention to provide in combinationwith the drawing rolls of a drawing mechanism, a clearer board which isresiliently supported against the lower peripheries 3 of said rolls by adetachable spring pressed arm which engages the lower central portion ofthe clearer. By making the arm detachable, the clearer may be entirelyremoved from the arm and also from engagement with the bottom of therolls.

It is a further object of this invention to provide a supporting meansfor the bottom roll clearer of a drawing frame, comprising a springpressed means for applying upward pressure upon said clearer and rolls,with means for varying the amount of pressure exerted by said spring.This feature enables the proper pressure adjustment to be effected, sothat the clearer will operate in the most efficient manner.

Some of the objects of the invention having been stated, other objectswill appear as the description proceeds when taken in connection withthe accompanying drawing, in which:-

Figure 1 is a top plan view of a portion of a drawing mechanism showingthe invention applied thereto;

Figure 2 is a transverse, vertical, sectional view taken along the line22 in Figure 1;

Figure 3 is a vertical, sectional view taken along a the line 3 3 inFigure 2;

Figure 4 is a sectional, detail, plan View taken along line 4-4 inFigure 2;

Figure 5 is a sectional, detail, plan view taken along line 5-5 inFigure 2;

Figure 6 is an isometric view of the spring actuated lever whichsupports the clearer against the bottom roll.

Referring more specifically to the drawing, the numeral iii denotes asuitable roll stand support which has secured to the upper side thereofa plurality of spaced roll stands such as H and i2. Between these rollstands are rotatably mounted suitable fluted bottom drawing rolls l3, l4and I5, upon which normally rest top rolls Ni, ii and 88, respectively.Between these rolls, a strand or sliver or yarn i9 is adapted to bepassed during a drawing operation. The rear, upper corner of roll standsI! and I2 (Figs. 1 and 2) have pivoted therebetween a longitudinallydisposed shaft 25 upon which is secured upstanding 2U brackets 26, saidbrackets having rods 2! adjustably secured therein by means of set screw28. These rods also have bearings. 29 adjustably secured thereon bymeans of set screws 39 and between alined pairs of these bearings, theends of top rollers l6, l1 and I8 are adapted to be journaled.

The front lower rolls I4 and i5 have a wedgeshaped clearing board 3!normally resting against the lower side thereof for removing the fibres30 which have accumulated upon the peripheries of these rolls. Thisclearing board, of course, has a flannel or fibre covering 3la which isused as a contact medium between the board and the rolls. When thisboard has collected a certain amount 35 of fibres or waste, it is thepractice in the mills to remove the board and then cleanse the excessfibres therefrom, after which it is replaced in contact with the rollsas shown in the drawing.

The parts thus far described are conventional, 40 but it is thought tobe necessary to describe this much of the old structure in order to moreclearly set forth the purpose of the present invention.

In order to properly support the clearing board 45 3! so that its upperside will engage the lower pehipheries of bottom rolls [4 and i5, I haveprovided suitable lever 33 which has pivoted thereto as at 34, anupwardly extending pin 35. This pin loosely penetrates a suitable holein the lower side 5 of the clearer board 3| and substantially midway itsends since the board is supported at one point only. The lever 33 hasits other end fixedly secured in the upper end of the pivoted platemember 36, said plate member having its bearing ends 55 36a pivotallymounted in bearing blocks 31 and 38, which are disposed in the housing39. The bearing blocks 31 and 38 are securely held within the housing 39by means of screws 31a and 38a, respectively, (Fig. 3). A suitable slot40 is provided in the housing 39 so that the lever 33 can penetrate thesame and have pivotal movement about the ends 360.. This housing isL-shaped and has its upper end secured to an intermediate portion of rod21. The securing means comprises a T-shaped cap bearing 43 which isclamped downwardly against the top of the bar 21 by means of suitablescrews 44, said screws penetrating the bearing 43, and also beingthreadably secured in the housing 39. The lower portion of the pivotedplate 36 has another lever 46 extending laterally and downwardlytherefrom,

and to the lower end of this lever is secured one end of a suitabletension spring 41. The other end of the tension spring 41 is secured toan eye bolt 48 which penetrates the side wall of housing 39 and has asuitable nut 49 secured on the end thereof. When it is desired to adjustthe amount of tension upon the spring 41 it is only necessary to adjustthe nut 49 upon the threaded portion of eye bolt 48.

It is seen by observing Figure 2, that by virtue of the tension spring41, the members 33, 35 and 46 will be rotated in a counter-clockwisemanner about the pivot point 36a, to thereby cause bottom roll clearer3| to be resiliently held against the bottom surfaces of rolls l4 andI5. When it is desired to remove the clearer 3| it is only necessary tograsp the lever 33 and push it downwardly until the pin 35 is removedfrom the board 3|. After which, the board can be removed entirely fromthe machine and the necessary cleansing operations performed.

The housing 39 has suitable cover plates and 52 secured on opposed sidesthereof, by any suitable means such as screws 53 and 54, respectively.These covers may be removed for the purpose of gaining access to theparts disposed within the housing.

It is, therefore, seen that I have provided a simple inexpensive meansfor supporting bottom roll clearers, which make it easy for theoperators to detach the clearer and remove the lint and which also hasmeans for adjustment as to the amount of pressure between the clearerand the bottom rolls.

In the drawing and specification there has been set forth a preferredembodiment of the invention, and although specific terms are employed,they are used in a generic and descriptive sense only, and not forpurposes of limitation, the scope of the invention being set forth inthe appended claim.

I claim:

In a bottom roll clearer for drawing frames, a housing secured to thedrawing frame, a lever pivoted intermediate its ends to the housing, oneend of the lever projecting downwardly and rearwardly with relation tothe travel of a sliver or yarn being processed, a tension springconnected to said end, the other end of the lever projecting forwardlybeneath the bottom drawing rolls, a pin pivotally secured to the forwardend of said lever and projecting upwardly, a clearer board forengagement with the bottom rolls and having a cavity in the lower sidethereof for receiving the upper portion of said pin pivotally secured tosaid lever.

his NORFLEET O. x PETREA.

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